[Bug 84072] New: [BDW][Audio][HD-A Display]:Playback abnormally after changing the output pipe with DP

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=84072

          Priority: medium
            Bug ID: 84072
                CC: intel-gfx-bugs at lists.freedesktop.org
          Assignee: intel-gfx-bugs at lists.freedesktop.org
           Summary: [BDW][Audio][HD-A Display]:Playback abnormally after
                    changing the output pipe with DP
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
          Severity: normal
    Classification: Unclassified
                OS: Linux (All)
          Reporter: libin.yang at intel.com
          Hardware: Other
            Status: NEW
           Version: XOrg CVS
         Component: DRM/Intel
           Product: DRI

Bug detailed description
First play a audio then changing the output pipe with DP
The audio sound is abnormally when play the same audio again.
Reproduce Steps
1.$aplay -D hw:0,3 /home/wjl/Music/1_WAV_PCM_48000Hz_stereo_16bit.wav
2.$ xrandr --verbose
3.$ xrandr --output DP1 --crtc 2
4.$ aplay -D hw:0,3 /home/wjl/Music/1_WAV_PCM_48000Hz_stereo_16bit.wav
Expected Result
After step 4, should play audio normally.
Actual Result
After step 4,the audio sound is abnormally.
Comment
The bug happens randomly and can be reproduced only on DELL U3011. What's more,
we found after running the command `xrandr --output DP1 --crtc 2`, the display
will be abnormal on the monitor DELL U3011. It seems there is offset to display
the desktop.

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